Lcd Trouble - LG -A290 Service Manual

4.7 LCD Trouble

VBAT(TP1)
VBAT(TP1)
LCD_WR(TP2)
LCD_RS(TP3)
LCD_CS(TP4)
LCD_WR
LCD_RS
LCD_CS
LCD_DATA07
LCD_DATA05
LCD_DATA03
LCD_DATA01
LCD_DATA06
LCD_DATA04
LCD_DATA02
LCD_DATA00
LGE Internal Use Only
CN301
FL302
FL300
FL301
Figure 4.7.1
LCD INTERFACE CONNECTOR
FL300
LCD_LED_CA1
LCD_LED_CA2
FL300
LCD_LED_CA3
1 9
INOUT_A1 INOUT_B1
2 8
INOUT_A2 INOUT_B2
3 7
INOUT_A3 INOUT_B3
4 6
INOUT_A4 INOUT_B4
LCD_VSYNC
7.5pF
FL301
FL301
1 9
INOUT_A1 INOUT_B1
2 8
INOUT_A2 INOUT_B2
3 7
INOUT_A3 INOUT_B3
4 6
INOUT_A4 INOUT_B4
7.5pF
FL302
FL302
1 9
INOUT_A1 INOUT_B1
2 8
INOUT_A2 INOUT_B2
3 7
INOUT_A3 INOUT_B3
4 6
INOUT_A4 INOUT_B4
7.5pF
GP : LOW
LGIT : HIGH
Figure 4.7.2
- 76 -
VIO
CN301
R308
R307
DNI 100K
35
34
33
32
31
30
29
28
LCD_RD 27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
R311
5
LCD_ID
100K
4
3
2
1
CN301
Copyright © 01 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
TP1
VBAT
C305
2.2u
R310
100K
LCD_RESET
C322
1u
VIO VIO
C308 C309
1u
1u
Only for training and service purposes